/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.mpp.plan.analyze;

import org.apache.iotdb.commons.path.PartialPath;
import org.apache.iotdb.commons.path.PathPatternTree;
import org.apache.iotdb.db.metadata.template.Template;
import org.apache.iotdb.db.mpp.common.schematree.ClusterSchemaTree;
import org.apache.iotdb.db.mpp.common.schematree.ISchemaTree;
import org.apache.iotdb.db.mpp.common.schematree.node.SchemaEntityNode;
import org.apache.iotdb.db.mpp.common.schematree.node.SchemaInternalNode;
import org.apache.iotdb.db.mpp.common.schematree.node.SchemaMeasurementNode;
import org.apache.iotdb.db.mpp.common.schematree.node.SchemaNode;
import org.apache.iotdb.db.mpp.plan.analyze.schema.ISchemaFetcher;
import org.apache.iotdb.tsfile.file.metadata.enums.CompressionType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding;
import org.apache.iotdb.tsfile.utils.Pair;
import org.apache.iotdb.tsfile.write.schema.MeasurementSchema;

import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.function.Function;

public class FakeSchemaFetcherImpl implements ISchemaFetcher {

    private final ClusterSchemaTree schemaTree = new ClusterSchemaTree(generateSchemaTree());

    @Override
    public ClusterSchemaTree fetchSchema(PathPatternTree patternTree) {
        schemaTree.setDatabases(Collections.singleton("root.sg"));
        return schemaTree;
    }

    @Override
    public ISchemaTree fetchSchemaWithTags(PathPatternTree patternTree) {
        return fetchSchema(patternTree);
    }

    @Override
    public ISchemaTree fetchSchemaWithAutoCreate(
            PartialPath devicePath,
            String[] measurements,
            Function<Integer, TSDataType> getDataType,
            boolean aligned) {
        return schemaTree;
    }

    /**
     * Generate the following tree: root.sg.d1.s1, root.sg.d1.s2(status) root.sg.d2.s1,
     * root.sg.d2.s2(status) root.sg.d2.a.s1, root.sg.d2.a.s2(status)
     *
     * @return the root node of the generated schemTree
     */
    private SchemaNode generateSchemaTree() {
        SchemaNode root = new SchemaInternalNode("root");

        SchemaNode sg = new SchemaInternalNode("sg");
        root.addChild("sg", sg);

        SchemaMeasurementNode s1 =
                new SchemaMeasurementNode("s1", new MeasurementSchema("s1", TSDataType.INT32));
        s1.setTagMap(Collections.singletonMap("key1", "value1"));
        SchemaMeasurementNode s2 =
                new SchemaMeasurementNode("s2", new MeasurementSchema("s2", TSDataType.DOUBLE));
        s2.setTagMap(Collections.singletonMap("key1", "value1"));
        SchemaMeasurementNode s3 =
                new SchemaMeasurementNode("s3", new MeasurementSchema("s3", TSDataType.BOOLEAN));
        s3.setTagMap(Collections.singletonMap("key1", "value2"));
        SchemaMeasurementNode s4 =
                new SchemaMeasurementNode("s4", new MeasurementSchema("s4", TSDataType.TEXT));
        s4.setTagMap(Collections.singletonMap("key2", "value1"));
        s2.setAlias("status");

        SchemaEntityNode d1 = new SchemaEntityNode("d1");
        sg.addChild("d1", d1);
        d1.addChild("s1", s1);
        d1.addChild("s2", s2);
        d1.addAliasChild("status", s2);
        d1.addChild("s3", s3);

        SchemaEntityNode d2 = new SchemaEntityNode("d2");
        sg.addChild("d2", d2);
        d2.addChild("s1", s1);
        d2.addChild("s2", s2);
        d2.addAliasChild("status", s2);
        d2.addChild("s4", s4);

        SchemaEntityNode a = new SchemaEntityNode("a");
        a.setAligned(true);
        d2.addChild("a", a);
        a.addChild("s1", s1);
        a.addChild("s2", s2);
        a.addAliasChild("status", s2);

        return root;
    }

    @Override
    public ISchemaTree fetchSchemaListWithAutoCreate(
            List<PartialPath> devicePath,
            List<String[]> measurements,
            List<TSDataType[]> tsDataTypes,
            List<Boolean> aligned) {
        return null;
    }

    @Override
    public ISchemaTree fetchSchemaListWithAutoCreate(
            List<PartialPath> devicePath,
            List<String[]> measurements,
            List<TSDataType[]> tsDataTypes,
            List<TSEncoding[]> encodings,
            List<CompressionType[]> compressionTypes,
            List<Boolean> aligned) {
        return null;
    }

    @Override
    public Pair<Template, PartialPath> checkTemplateSetInfo(PartialPath path) {
        return null;
    }

    @Override
    public Map<Integer, Template> checkAllRelatedTemplate(PartialPath pathPattern) {
        return Collections.emptyMap();
    }

    @Override
    public Pair<Template, List<PartialPath>> getAllPathsSetTemplate(String templateName) {
        return null;
    }

    @Override
    public void invalidAllCache() {
    }
}
